1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
|
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<style type="text/css">
@import url('../css/main.css');
</style>
<title>Installing Parabola GNU/Linux with full disk encryption (including /boot)</title>
</head>
<body>
<div class="section">
<h1>Installing Parabola GNU/Linux with full disk encryption (including /boot)</h1>
<p>
Libreboot uses the GRUB <a href="http://www.coreboot.org/Payloads#GRUB_2">payload</a>
by default, which means that the GRUB configuration file
(where your GRUB menu comes from) is stored directly alongside libreboot
and it's GRUB payload executable, inside
the flash chip. In context, this means that installing distributions and managing them
is handled slightly differently compared to traditional BIOS systems.
</p>
<p>
On most systems, the /boot partition has to be left unencrypted while the others are encrypted.
This is so that GRUB, and therefore the kernel, can be loaded and executed since the firmware
can't open a LUKS volume. Not so with libreboot! Since GRUB is already included directly as a
payload, even /boot can be encrypted. This protects /boot from tampering by someone with physical
access to the system.
</p>
<p>
<a href="index.html">Back to previous index</a>
</p>
</div>
<div class="section">
<p>
Boot Parabola's install environment. <a href="grub_boot_installer.html">How to boot a GNU/Linux installer</a>.
</p>
<p>
For this guide I used the 2015 08 01 image to boot the live installer and install the system.
This is available at <a href="https://wiki.parabola.nu/Get_Parabola#Main_live_ISO">this page</a>.
</p>
<p>
This guide will go through the installation steps taken at the time of writing, which may or may not change due to
the volatile nature of Parabola (it changes all the time). In general most of it should remain the same. If you spot mistakes,
please say so! This guide will be ported to the Parabola wiki at a later date. For up to date Parabola install guide, go to
the Parabola wiki. This guide essentially cherry picks the useful information (valid at the
time of writing: 2015-08-25).
</p>
</div>
<div class="section">
<p> This section deals with wiping the storage device on which you plan to install Parabola
GNU/Linux. Follow these steps, but if you use an SSD, also:
<p>
- beware there are issues with TRIM (not enabled through luks) and security issues if you do enable it.
See <a href="https://wiki.archlinux.org/index.php/Dm-crypt/Specialties#Discard.2FTRIM_support_for_solid_state_drives_.28SSD.29">this page</a>
for more info.
</p>
<p> - make sure it's brand-new (or barely used). Or, otherwise, be sure that it never previously contained plaintext copies of your data.
</p>
<p> - make sure to read <a href="https://wiki.archlinux.org/index.php/Solid_State_Drives">this article</a>. Edit /etc/fstab later on when
chrooted into your install. Also, read the whole article and keep all points in mind, adapting them for this guide.
</p>
<p>
Wipe the MBR (if you use MBR):<br/>
# <b>lsblk</b><br/>
Your storage is probably /dev/sda, but be very sure to double check this or you WILL lose your data!<br/>
# <b>dd if=/dev/zero of=/dev/sda bs=446 count=1; sync</b><br/>
Never use SeaBIOS! The MBR section can easily be changed with malicious code, which SeaBIOS will blindly execute.
This guide is for libreboot with GRUB-as-payload only.
</p>
<p>
Securely wipe the drive:<br/>
# <b>dd if=/dev/urandom of=/dev/sda; sync</b><br/>
NOTE: If you have an SSD, only do this the first time. If it was already LUKS-encrypted before,
use the info below to wipe the LUKS header. Also, check online for your SSD what the recommended
erase block size is. For example if it was 2MiB:<br/>
# <b>dd if=/dev/urandom of=/dev/sda bs=2M; sync</b>
</p>
<p>
If your drive was already LUKS encrypted (maybe you are re-installing your distro) then
it is already 'wiped'. You should just wipe the LUKS header.
<a href="https://www.lisenet.com/2013/luks-add-keys-backup-and-restore-volume-header/">https://www.lisenet.com/2013/luks-add-keys-backup-and-restore-volume-header/</a>
showed me how to do this. It recommends doing the first 3MiB. Now, that guide is recommending putting zero there. I'm going to use urandom. Do this:<br/>
# <b>head -c 3145728 /dev/urandom > /dev/sda; sync</b><br/>
(Wiping the LUKS header is important, since it has hashed passphrases and so on. It's 'secure', but 'potentially' a risk).
</p>
</div>
<div class="section">
<h2>
Change keyboard layout
</h2>
<p>
Parabola live shell assumes US Qwerty. If you have something different, list the available keymaps and use yours:<br/>
# <b>localectl list-keymaps</b><br/>
# <b>loadkeys LAYOUT</b><br/>
For me, LAYOUT would have been dvorak-uk.
</p>
</div>
<div class="section">
<h2>Establish an internet connection</h2>
<p>
Refer to <a href="https://wiki.parabola.nu/Beginners%27_guide#Establish_an_internet_connection">this guide</a>. Wired is recommended,
but wireless is also explained there.
</p>
</div>
<div class="section">
<h2>Getting started</h2>
<p>
The beginning is based on <a href="https://wiki.parabolagnulinux.org/Installation_Guide">https://wiki.parabolagnulinux.org/Installation_Guide</a>.
Then I referred to <a href="https://wiki.archlinux.org/index.php/Partitioning">https://wiki.archlinux.org/index.php/Partitioning</a> at first.
</p>
</div>
<div class="section">
<h2>dm-mod</h2>
<p>
device-mapper will be used - a lot. Make sure that the kernel module is loaded:<br/>
# <b>modprobe dm-mod</b>
</p>
<h2>Create LUKS partition</h2>
<p>
I am using MBR partitioning, so I use cfdisk:<br/>
# <b>cfdisk /dev/sda</b>
</p>
<p>
I create a single large sda1 filling the whole drive, leaving it as the default type 'Linux' (83).
</p>
<p>
Now I refer to <a href="https://wiki.archlinux.org/index.php/Dm-crypt/Drive_preparation#Partitioning">https://wiki.archlinux.org/index.php/Dm-crypt/Drive_preparation#Partitioning</a>:<br/>
I am then directed to <a href="https://wiki.archlinux.org/index.php/Dm-crypt/Device_encryption">https://wiki.archlinux.org/index.php/Dm-crypt/Device_encryption</a>.
</p>
<p>
Parabola forces you to RTFM. Do that.
</p>
<p>
It tells me to run:<br/>
# <b>cryptsetup benchmark</b> (for making sure the list below is populated)<br/>
Then:<br/>
# <b>cat /proc/crypto</b><br/>
This gives me crypto options that I can use. It also provides a representation of the best way to set up LUKS (in this case, security is a priority; speed, a distant second).
To gain a better understanding, I am also reading:<br/>
# <b>man cryptsetup</b>
</p>
<p>
Following that page, based on my requirements, I do the following based on <a href="https://wiki.archlinux.org/index.php/Dm-crypt/Device_encryption#Encryption_options_for_LUKS_mode">https://wiki.archlinux.org/index.php/Dm-crypt/Device_encryption#Encryption_options_for_LUKS_mode</a>.
Reading through, it seems like Serpent (encryption) and Whirlpool (hash) is the best option.
</p>
<p>
I am initializing LUKS with the following:<br/>
# <b>cryptsetup -v --cipher serpent-xts-plain64 --key-size 512 --hash whirlpool --use-random --verify-passphrase luksFormat /dev/sda1</b>
Choose a <b>secure</b> passphrase here. Ideally lots of lowercase/uppercase numbers, letters, symbols etc all in a random pattern. The
password length should be as long as you are able to handle without writing it down or storing it anywhere.
</p>
</div>
<div class="section">
<h2>Create LVM</h2>
<p>
Now I refer to <a href="https://wiki.archlinux.org/index.php/LVM">https://wiki.archlinux.org/index.php/LVM</a>.
</p>
<p>
Open the LUKS partition:<br/>
# <b>cryptsetup luksOpen /dev/sda1 lvm</b><br/>
(it will be available at /dev/mapper/lvm)
</p>
<p>
Create LVM partition:<br/>
# <b>pvcreate /dev/mapper/lvm</b><br/>
Show that you just created it:<br/>
# <b>pvdisplay</b>
</p>
<p>
Now I create the volume group, inside of which the logical volumes will be created:<br/>
# <b>vgcreate matrix /dev/mapper/lvm</b><br/>
(volume group name is 'matrix' - choose your own name, if you like)
Show that you created it:<br/>
# <b>vgdisplay</b>
</p>
<p>
Now create the logical volumes:<br/>
# <b>lvcreate -L 2G matrix -n swapvol</b> (2G swap partition, named <u>swapvol</u>)<br/>
Again, choose your own name if you like. Also, make sure to choose a swap size of your own needs. It basically depends on how much RAM
you have installed. I refer to <a
href="http://www.linux.com/news/software/applications/8208-all-about-linux-swap-space">http://www.linux.com/news/software/applications/8208-all-about-linux-swap-space</a>.<br/>
# <b>lvcreate -l +100%FREE matrix -n rootvol</b> (single large partition in the rest of the space, named <u>rootvol</u>)<br/>
You can also be flexible here, for example you can specify a /boot, a /, a /home, a /var, a /usr, etc. For example,
if you will be running a web/mail server then you want /var in its own partition (so that if it fills up with logs, it won't crash your system).
For a home/laptop system (typical use case), a root and a swap will do (really).
</p>
<p>
Verify that the logical volumes were created, using the following command:<br/>
# <b>lvdisplay</b>
</p>
</div>
<div class="section">
<h2>Create / and swap partitions, and mount</h2>
<p>
For the swapvol LV I use:<br/>
# <b>mkswap /dev/mapper/matrix-swapvol</b><br/>
Activate swap:<br/>
# <b>swapon /dev/matrix/swapvol</b>
</p>
<p>
For the rootvol LV I use:<br/>
# <b>mkfs.ext4 /dev/mapper/matrix-rootvol</b>
</p>
<p>
Mount the root (/) partition:<br/>
# <b>mount /dev/matrix/rootvol /mnt</b>
</p>
</div>
<div class="section">
<h2>Continue with Parabola installation</h2>
<p>
This guide is really about GRUB, Parabola and cryptomount. I have to show how to install Parabola
so that the guide can continue.
</p>
<p>
Now I am following the rest of <a href="https://wiki.parabolagnulinux.org/Installation_Guide">https://wiki.parabolagnulinux.org/Installation_Guide</a>.
I also cross referenced <a href="https://wiki.archlinux.org/index.php/Installation_guide">https://wiki.archlinux.org/index.php/Installation_guide</a>.
</p>
<p>
Create /home and /boot on rootvol mountpoint:<br/>
# <b>mkdir -p /mnt/home</b><br/>
# <b>mkdir -p /mnt/boot</b>
</p>
<p>
Once all the remaining partitions, if any, have been mounted, the devices are ready to install Parabola.
</p>
<p>
In <b>/etc/pacman.d/mirrorlist</b>, comment out all lines except the Server line closest to where you are (I chose the UK Parabola
server (main server)) and then did:<br/>
# <b>pacman -Syy</b><br/>
# <b>pacman -Syu</b><br/>
# <b>pacman -Sy pacman</b> (and then I did the other 2 steps above, again)<br/>
In my case I did the steps in the next paragraph, and followed the steps in this paragraph again.
</p>
<p>
<troubleshooting><br/>
The following is based on 'Verification of package signatures' in the Parabola install guide.<br/>
Check there first to see if steps differ by now.<br/>
Now you have to update the default Parabola keyring. This is used for signing and verifying packages:<br/>
# <b>pacman -Sy parabola-keyring</b><br/>
It says that if you get GPG errors, then it's probably an expired key and, therefore, you should do:<br/>
# <b>pacman-key --populate parabola</b><br/>
# <b>pacman-key --refresh-keys</b><br/>
# <b>pacman -Sy parabola-keyring</b><br/>
To be honest, you should do the above anyway. Parabola has a lot of maintainers, and a lot of keys. Really!<br/>
If you get an error mentioning dirmngr, do:<br/>
# <b>dirmngr </dev/null</b><br/>
Also, it says that if the clock is set incorrectly then you have to manually set the correct time <br/>
(if keys are listed as expired because of it):<br/>
# <b>date MMDDhhmm[[CC]YY][.ss]</b><br/>
I also had to install:<br/>
# <b>pacman -S archlinux-keyring</b><br/>
# <b>pacman-key --populate archlinux</b><br/>
In my case I saw some conflicting files reported in pacman, stopping me from using it.<br/>
I deleted the files that it mentioned
and then it worked. Specifically, I had this error:<br/>
<i>licenses: /usr/share/licenses/common/MPS exists in filesystem</i><br/>
I rm -Rf'd the file and then pacman worked. I'm told that the following would have also made it work:<br/>
# <b>pacman -Sf licenses</b><br/>
</troubleshooting><br/>
</p>
<p>
I also like to install other packages (base-devel, compilers and so on) and wpa_supplicant/dialog/iw/wpa_actiond are needed for wireless after the install:<br/>
# <b>pacstrap /mnt base base-devel wpa_supplicant dialog iw wpa_actiond</b>
</p>
</div>
<div class="section">
<h2>Configure the system</h2>
<p>
Generate an fstab - UUIDs are used because they have certain advantages (see <a href="https://wiki.parabola.nu/Fstab#Identifying_filesystems">https://wiki.parabola.nu/Fstab#Identifying_filesystems</a>.
If you prefer labels instead, replace the -U option with -L):<br/>
# <b>genfstab -U -p /mnt >> /mnt/etc/fstab</b><br/>
Check the created file:<br/>
# <b>cat /mnt/etc/fstab</b><br/>
(If there are any errors, edit the file. Do <b>NOT</b> run the genfstab command again!)
</p>
<p>
Chroot into new system:<br/>
# <b>arch-chroot /mnt /bin/bash</b>
</p>
<p>
It's a good idea to have this installed:<br/>
# <b>pacman -S linux-libre-lts</b>
</p>
<p>
It was also suggested that you should install this kernel (read up on what GRSEC is):<br/>
# <b>pacman -S linux-libre-grsec</b>
</p>
<p>
This is another kernel that sits inside /boot, which you can use. LTS means 'long-term support'. These are so-called 'stable' kernels
that can be used as a fallback during updates, if a bad kernel causes issues for you.
</p>
<p>
Parabola does not have wget. This is sinister. Install it:<br/>
# <b>pacman -S wget</b>
</p>
<p>
Locale:<br/>
# <b>nano /etc/locale.gen</b><br/>
Uncomment your needed localisations. For example en_GB.UTF-8 (UTF-8 is highly recommended over other options).<br/>
# <b>locale-gen</b><br/>
# <b>echo LANG=en_GB.UTF-8 > /etc/locale.conf</b><br/>
# <b>export LANG=en_GB.UTF-8</b>
</p>
<p>
Console font and keymap:<br/>
# <b>nano /etc/vconsole.conf</b><br/>
In my case:
KEYMAP=dvorak-uk
FONT=Lat9w-16
</p>
<p>
Time zone:<br/>
# <b>ln -s /usr/share/zoneinfo/Europe/London /etc/localtime</b><br/>
(Replace Zone and Subzone to your liking. See /usr/share/zoneinfo)
</p>
<p>
Hardware clock:<br/>
# <b>hwclock --systohc --utc</b>
</p>
<p>
Hostname:
Write your hostname to /etc/hostname. For example, if your hostname is parabola:<br/>
# <b>echo parabola > /etc/hostname</b><br/>
Add the same hostname to /etc/hosts:<br/>
# <b>nano /etc/hosts</b><br/>
</p>
<pre>
#<ip-address> <hostname.domain.org> <hostname>
127.0.0.1 localhost.localdomain localhost parabola
::1 localhost.localdomain localhost parabola
</pre>
<p> Configure the network:
Refer to <a href="https://wiki.parabola.nu/Beginners%27_guide#Configure_the_network">https://wiki.parabola.nu/Beginners%27_guide#Configure_the_network</a>.
</p>
<p> Mkinitcpio:
Configure /etc/mkinitcpio.conf as needed (see <a href="https://wiki.parabola.nu/Mkinitcpio">https://wiki.parabola.nu/Mkinitcpio</a>).
Runtime modules can be found in /usr/lib/initcpio/hooks, and build hooks can be found in /usr/lib/initcpio/install. (# <b>mkinitcpio -H hookname</b> gives information about each hook.)
Specifically, for this use case:<br/>
# <b>nano /etc/mkinitcpio.conf</b><br/>
Then modify the file like so:
</p>
<ul>
<li>MODULES="i915"</li>
<li>This forces the driver to load earlier, so that the console font isn't wiped out after getting to login)</li>
<li>HOOKS="base udev autodetect modconf block keyboard keymap consolefont encrypt lvm2 filesystems fsck shutdown"</li>
<li>Explanation:</li>
<li>keymap adds to initramfs the keymap that you specified in /etc/vconsole.conf</li>
<li>consolefont adds to initramfs the font that you specified in /etc/vconsole.conf</li>
<li>encrypt adds LUKS support to the initramfs - needed to unlock your disks at boot time</li>
<li>lvm2 adds LVM support to the initramfs - needed to mount the LVM partitions at boot time</li>
<li>shutdown is needed according to Parabola wiki for unmounting devices (such as LUKS/LVM) during shutdown)</li>
</ul>
<p>
Now using mkinitcpio, you can create the kernel and ramdisk for booting with (this is different from Arch, specifying linux-libre instead of linux):<br/>
# <b>mkinitcpio -p linux-libre</b><br/>
Also do it for linux-libre-lts:<br/>
# <b>mkinitcpio -p linux-libre-lts</b><br/>
Also do it for linux-libre-grsec:<br/>
# <b>mkinitcpio -p linux-libre-grsec</b>
</p>
<p>
Set the root password:
At the time of writing, Parabola used SHA512 by default for its password hashing. I referred to <a href="https://wiki.archlinux.org/index.php/SHA_password_hashes">https://wiki.archlinux.org/index.php/SHA_password_hashes</a>.<br/>
# <b>nano /etc/pam.d/passwd</b><br/>
Add rounds=65536 at the end of the uncommented 'password' line.<br/>
# <b>passwd root</b><br/>
Make sure to set a secure password! Also, it must never be the same as your LUKS password.
</p>
</div>
<div class="section">
<h2>Extra security tweaks</h2>
<p>
Based on <a href="https://wiki.archlinux.org/index.php/Security">https://wiki.archlinux.org/index.php/Security</a>.
</p>
<p>
Restrict access to important directories:<br/>
# <b>chmod 700 /boot /etc/{iptables,arptables}</b>
</p>
<p>
Lockout user after three failed login attempts:<br/>
Edit the file /etc/pam.d/system-login and comment out that line:<br/>
<i># auth required pam_tally.so onerr=succeed file=/var/log/faillog</i><br/>
Or just delete it. Above it, put:<br/>
<i>auth required pam_tally.so deny=2 unlock_time=600 onerr=succeed file=/var/log/faillog</i><br/>
To unlock a user manually (if a password attempt is failed 3 times), do:<br/>
# <b>pam_tally --user <i>theusername</i> --reset</b>
What the above configuration does is lock the user out for 10 minutes, if they make 3 failed login attempts.
</p>
<p>
Configure sudo - not covered here. Will be covered post-installation in another tutorial, at a later date.
If this is a single-user system, you don't really need sudo.
</p>
</div>
<div class="section">
<h2>Unmount, reboot!</h2>
<p>
Exit from chroot:<br/>
# <b>exit</b>
</p>
<p>
unmount:<br/>
# <b>umount -R /mnt</b><br/>
# <b>swapoff -a</b>
</p>
<p>
deactivate the lvm lv's:<br/>
# <b>lvchange -an /dev/matrix/rootvol</b><br/>
# <b>lvchange -an /dev/matrix/swapvol</b><br/>
</p>
<p>
Lock the encrypted partition (close it):<br/>
# <b>cryptsetup luksClose lvm</b>
</p>
<p>
# <b>shutdown -h now</b><br/>
Remove the installation media, then boot up again.
</p>
</div>
<div class="section">
<h2>Booting from GRUB</h2>
<p>
Initially you will have to boot manually. Press C to get to the GRUB command line. The underlined parts are optional
(using those 2 underlines will boot lts kernel instead of normal).
</p>
<p>
grub> <b>cryptomount -a</b><br/>
grub> <b>set root='lvm/matrix-rootvol'</b><br/>
grub> <b>linux /boot/vmlinuz-linux-libre<u>-lts</u> root=/dev/matrix/rootvol cryptdevice=/dev/sda1:root</b><br/>
grub> <b>initrd /boot/initramfs-linux-libre<u>-lts</u>.img</b><br/>
grub> <b>boot</b><br/>
</p>
<p>
You could also make it load /boot/vmlinuz-linux-libre-grsec and /boot/initramfs-linux-libre-grsec.img
</p>
</div>
<div class="section">
<h2>Modify grub.cfg inside the ROM</h2>
<p>
Now you need to modify the ROM, so that Parabola can boot automatically with this configuration.
<a href="grub_cbfs.html">grub_cbfs.html</a> shows you how. Follow that guide, using the configuration details below.
</p>
<p>
Inside the 'Load Operating System' menu entry, change the contents to:<br/>
<b><i>
cryptomount -a<br/>
set root='lvm/matrix-rootvol'<br/>
linux /boot/vmlinuz-linux-libre<u>-lts</u> root=/dev/matrix/rootvol cryptdevice=/dev/sda1:root<br/>
initrd /boot/initramfs-linux-libre<u>-lts</u>.img
</i></b>
</p>
<p>
Note: the underlined parts above (-lts) can also be removed, to boot the latest kernel instead of LTS (long-term support) kernels.
You could also copy the menu entry and in one have -lts, and without in the other menuentry.
You could also create a menu entry to load /boot/vmlinuz-linux-libre-grsec and /boot/initramfs-linux-libre-grsec.img
</p>
<p>
Without specifying a device, the <i>-a</i> parameter tries to unlock all detected LUKS volumes.
You can also specify -u UUID or -a (device).
</p>
<p>
Personally, I opted to have the entry for linux-libre-grsec at the top, so that it would load by default.
</p>
<p>
Above the 'Load Operating System' menu entry you should also add a GRUB password, like so:
</p>
<pre><b><i>
set superusers="root"
password_pbkdf2 root grub.pbkdf2.sha512.10000.711F186347156BC105CD83A2ED7AF1EB971AA2B1EB2640172F34B0DEFFC97E654AF48E5F0C3B7622502B76458DA494270CC0EA6504411D676E6752FD1651E749.8DD11178EB8D1F633308FD8FCC64D0B243F949B9B99CCEADE2ECA11657A757D22025986B0FA116F1D5191E0A22677674C994EDBFADE62240E9D161688266A711
</i></b></pre>
<p style="font-size:2em;">
MAKE SURE TO DO THIS ON grubtest.cfg *BEFORE* DOING IT ON grub.cfg.
Then select the menu entry that says <i>Switch to grubtest.cfg</i> and test that it works.
Then copy that to grub.cfg once you're satisfied.
WHY? BECAUSE AN INCORRECTLY SET PASSWORD CONFIG MEANS YOU CAN'T AUTHENTICATE, WHICH MEANS 'BRICK'.
</p>
<p>
(emphasis added, because it's needed. This is a common roadblock for users)
</p>
<p>
Note that the above entry specifies user 'root'; this is just a username for GRUB. You don't even need to use root.
Change root on both of those 2 lines to whatever you want.
</p>
<p>
Start dhcp on ethernet:<br/>
# <b>systemctl start dhcpcd.service</b>
This is just for the step below. I won't cover network configuration here. That is for another Parabola article.
</p>
<p>
The password hash (it's <b>password</b>, by the way) after <i>'password_pbkdf2 root'</i> <i>should be changed</i> and is created by the <b>grub-mkpasswd-pbkdf2</b> utility, which you need to install or otherwise compile,
like so:<br/>
# <b>pacman -S grub</b>
</p>
<p>
GRUB isn't needed for booting, since it's already included as a payload in libreboot. This is only so that the utility needed becomes available. Get your hash
by entering your chosen password at the prompt, when running this command:<br/>
# <b>grub-mkpasswd-pbkdf2</b>
</p>
<p>
It will output the hash for the password that you entered. Make sure to specify a password that is different from both your LUKS *and* your root/user password.
Use it to replace the default hash mentioned above.
</p>
<p>
With this setup, you will have to enter a password at boot time, in GRUB, before being able to use any of the menu entries or switch to the terminal.
This protects your system from an attacker simply booting a live usb distro and re-flashing the boot firmware.
</p>
<p>
You probably only need base-devel (compilers and so on) to build and use cbfstool. It was already installed if you followed this tutorial, but here it is:<br/>
# <b>pacman -S base-devel</b>
</p>
<p>
For flashing the modified ROM, I just used flashrom from the Parabola repo's:<br/>
# <b>pacman -S flashrom</b><br/>
I also installed dmidecode:<br/>
# <b>pacman -S dmidecode</b>
</p>
<p>
When done, deleted GRUB (remember, we only needed it for the <i>grub-mkpasswd-pbkdf2</i> utility;
GRUB is already part of libreboot, flashed alongside it as a <i>payload</i>):<br/>
# <b>pacman -R grub</b>
</p>
</div>
<div class="section">
<p>
If you followed all that correctly, you should now have a fully encrypted Parabola installation.
This is a very barebones Parabola install (the default one). Refer to the wiki for how to do the rest
(desktop, etc).
</p>
</div>
<div class="section">
<h2>Using a key file to unlock /boot/</h2>
<p>
By default, you will have to enter your LUKS passphrase twice; once in GRUB, and once when booting the kernel.
GRUB unlocks the encrypted partition and then loads the kernel, but the kernel is not aware of the fact
that it is being loaded from an encrypted volume. Therefore, you will be asked to enter your passphrase a second time.
A workaround is to put a keyfile inside initramfs, with instructions for the kernel to use it when
booting. This is safe, because /boot/ is encrypted (otherwise, putting a keyfile inside initramfs would be a bad idea).<br/>
Generate the file:<br/>
# <b>dd bs=512 count=4 if=/dev/urandom of=/etc/mykeyfile iflag=fullblock</b><br/>
Insert it into the luks volume:<br/>
# <b>cryptsetup luksAddKey /dev/sdX /etc/mykeyfile</b><br/>
Add the keyfile to the initramfs by adding it to FILES in /etc/mkinitcpio.conf. For example:<br/>
Integrate it inside initramfs:<br/>
# <b>FILES="/etc/mykeyfile"</b><br/>
Create the initramfs image from scratch:<br/>
# <b>mkinitcpio -p linux-libre</b><br/>
Add the following to your grub.cfg, or add it in the kernel command line for GRUB:<br/>
# <b>cryptkey=rootfs:/etc/mykeyfile</b><br/>
<br/>
You can also place this inside the grub.cfg that exists in CBFS: <a href="grub_cbfs.html">grub_cbfs.html</a>.
</p>
</div>
<div class="section">
<h2>Further security tips</h2>
<p>
<a href="https://wiki.archlinux.org/index.php/Security">https://wiki.archlinux.org/index.php/Security</a>.<br/>
<a href="https://wiki.parabolagnulinux.org/User:GNUtoo/laptop">https://wiki.parabolagnulinux.org/User:GNUtoo/laptop</a>
</p>
</div>
<div class="section">
<h2>Follow-up tutorial: configuring Parabola</h2>
<p>
<a href="configuring_parabola.html">configuring_parabola.html</a> shows my own notes post-installation. Using these, you can get a basic
system similar to the one that I chose for myself. You can also cherry pick useful notes and come up with your own system.
Parabola is user-centric, which means that you are in control. For more information, read <a href="https://wiki.archlinux.org/index.php/The_Arch_Way">The Arch Way</a>
(Parabola also follows it).
</p>
</div>
<div class="section">
<p>
Copyright © 2014, 2015 Francis Rowe <info@gluglug.org.uk><br/>
Copyright © 2015 Jeroen Quint <jezza@diplomail.ch><br/>
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3
or any later version published by the Free Software Foundation;
with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
A copy of the license can be found at <a href="../gfdl-1.3.txt">../gfdl-1.3.txt</a>
</p>
<p>
Updated versions of the license (when available) can be found at
<a href="https://www.gnu.org/licenses/licenses.html">https://www.gnu.org/licenses/licenses.html</a>
</p>
<p>
UNLESS OTHERWISE SEPARATELY UNDERTAKEN BY THE LICENSOR, TO THE
EXTENT POSSIBLE, THE LICENSOR OFFERS THE LICENSED MATERIAL AS-IS
AND AS-AVAILABLE, AND MAKES NO REPRESENTATIONS OR WARRANTIES OF
ANY KIND CONCERNING THE LICENSED MATERIAL, WHETHER EXPRESS,
IMPLIED, STATUTORY, OR OTHER. THIS INCLUDES, WITHOUT LIMITATION,
WARRANTIES OF TITLE, MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE, NON-INFRINGEMENT, ABSENCE OF LATENT OR OTHER DEFECTS,
ACCURACY, OR THE PRESENCE OR ABSENCE OF ERRORS, WHETHER OR NOT
KNOWN OR DISCOVERABLE. WHERE DISCLAIMERS OF WARRANTIES ARE NOT
ALLOWED IN FULL OR IN PART, THIS DISCLAIMER MAY NOT APPLY TO YOU.
</p>
<p>
TO THE EXTENT POSSIBLE, IN NO EVENT WILL THE LICENSOR BE LIABLE
TO YOU ON ANY LEGAL THEORY (INCLUDING, WITHOUT LIMITATION,
NEGLIGENCE) OR OTHERWISE FOR ANY DIRECT, SPECIAL, INDIRECT,
INCIDENTAL, CONSEQUENTIAL, PUNITIVE, EXEMPLARY, OR OTHER LOSSES,
COSTS, EXPENSES, OR DAMAGES ARISING OUT OF THIS PUBLIC LICENSE OR
USE OF THE LICENSED MATERIAL, EVEN IF THE LICENSOR HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH LOSSES, COSTS, EXPENSES, OR
DAMAGES. WHERE A LIMITATION OF LIABILITY IS NOT ALLOWED IN FULL OR
IN PART, THIS LIMITATION MAY NOT APPLY TO YOU.
</p>
<p>
The disclaimer of warranties and limitation of liability provided
above shall be interpreted in a manner that, to the extent
possible, most closely approximates an absolute disclaimer and
waiver of all liability.
</p>
</div>
</body>
</html>
|
